There are various strategies being deployed around to get less lag/freezes:
- Exit battle.net app
- Disable sound and put a different driver in.
- lower the # of sound channels if disabling sound is unwanted
- Affinity of the D3 process in taskmanager to CPU 0 + 1
- Disabling Area Damage in parties on all but 1 player
and other solutions I might have missed.
Could you tell which of those became obsolete?